"Refered" to the Democrat, we find in the April 26, 1860 issue a letter from Griswold as well as "the rules of the game" and "a diagram showing the field and position of each player" just as Griswold stated. This is not only fascinating in and of itself but it's also more confirmation of the claims that Griswold made in his letter to Spink.
Griswold's letter from the April 26, 1860 issue of the Democrat appears below and I'll post the rest of the article tomorrow. I have to give a big hat tip to Paul Conley, who was kind enough to send me a copy of the April 26th issue. Mr. Conley's book, The Origins of Base Ball in St. Louis, will be going to the publishers soon and trust me when I tell you that I'm looking forward to getting my hands on it.